Frequencies for first 10,000 rows of mrterr variable in natlterr2007 dataset :

   Mother's |
  Residence |
Territory/P |
   osession |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
         AS |      1,288       12.88       12.88
         GU |      3,480       34.80       47.68
         MP |      1,387       13.87       61.55
         PR |      3,828       38.28       99.83
         US |          6        0.06       99.89
         XX |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015